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spi: spi-geni-qcom: enable SPI_CONTROLLER_MUST_TX for GPI DMA mode

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[ Upstream commit d10005837be83906bbd2078c3b4f9dfcbd6c95b6 ]

The GPI DMA mode requires for TX DMA to be prepared. Force SPI core to
provide TX buffer even if the caller didn't provide one by setting the
SPI_CONTROLLER_MUST_TX flag.

Fixes: b59c122484ec ("spi: spi-geni-qcom: Add support for GPI dma")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230629095847.3648597-1-dmitry.baryshkov@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dmitry Baryshkov 2023-06-29 12:58:47 +03:00 committed by Greg Kroah-Hartman
parent 946edfb7d4
commit a252547c89
1 changed files with 6 additions and 0 deletions
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6
drivers/spi/spi-geni-qcom.c
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@ -979,6 +979,12 @@ static int spi_geni_probe(struct platform_device *pdev)
if (mas->cur_xfer_mode == GENI_SE_FIFO)
spi->set_cs = spi_geni_set_cs;
/*
* TX is required per GSI spec, see setup_gsi_xfer().
*/
if (mas->cur_xfer_mode == GENI_GPI_DMA)
spi->flags = SPI_CONTROLLER_MUST_TX;
ret = request_irq(mas->irq, geni_spi_isr, 0, dev_name(dev), spi);
if (ret)
goto spi_geni_release_dma;